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[Bug]: Serial Module TEXTMSG mode allows the sending of blank messages and non-ASCII chars

Open linker3000 opened this issue 11 months ago • 0 comments

Category

Serial

Hardware

Other

Is this bug report about any UI component firmware like InkHUD or Meshtatic UI (MUI)?

  • [ ] Meshtastic UI aka MUI colorTFT
  • [ ] InkHUD ePaper
  • [ ] OLED slide UI on any display

Firmware Version

2.5.20.4c97351

Description

Board is the Xiao ESP32S3 + Wio Lora.

With the serial module enabled in TEXTMSG mode and using the Linux Screen app as a terminal, pressing the ENTER key sends a blank message.

When plugging the USB cable into the (3.3V) USB to serial TTL adapter, it will sometimes generate spurious, non-ASCII character noise (probably unavoidable), which is also sent.

Suggestions:

  1. The serial module shouldn't allow blank messages (CR or CRLF only) to be sent.
  2. Maybe strip leading spaces before checking for blank messages?
  3. The serial module should not allow the sending of non-ASCII characters, except BEL and maybe some other important ones, if there are any.

Relevant log output

linker3000 avatar Mar 29 '25 11:03 linker3000